package com.flbill.interceptor;

import com.flbill.common.constant.JwtClaimsConstant;
import com.flbill.common.utils.BaseContext;
import com.flbill.common.properties.JwtProperties;
import com.flbill.common.utils.JwtUtils;
import io.jsonwebtoken.Claims;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;
import org.springframework.web.method.HandlerMethod;
import org.springframework.web.servlet.HandlerInterceptor;

import jakarta.servlet.http.HttpServletRequest;
import jakarta.servlet.http.HttpServletResponse;

@Component
@Slf4j
public class JwtTokenUserInterceptor implements HandlerInterceptor {

    @Autowired
    private JwtProperties jwtProperties;

    /**
     * 校验jwt
     *
     * @param request
     * @param response
     * @param handler
     * @return
     * @throws Exception
     */
    public boolean preHandle(HttpServletRequest request, HttpServletResponse response, Object handler) throws Exception {
        //System.out.println("线程id"+Thread.currentThread().getId());
        //判断当前拦截到的是Controller的方法还是其他资源
        if (!(handler instanceof HandlerMethod)) {
            //当前拦截到的不是动态方法，直接放行
            return true;
        }

        //1、从请求头中获取令牌，优先 Authorization: Bearer xxx
        String token = null;
        String authHeader = request.getHeader("Authorization");
        if (authHeader != null && authHeader.startsWith("Bearer ")) {
            token = authHeader.substring(7);
        } else {
            token = request.getHeader(jwtProperties.getUserTokenName());
        }

        //2、校验令牌
        try {
            log.info("jwt校验:{}", token);
            Claims claims = JwtUtils.parseToken(token, jwtProperties.getUserSecretKey());
            Long userId = Long.valueOf(claims.get(JwtClaimsConstant.USER_ID).toString());
            BaseContext.setCurrentId(userId);
            log.info("当前用户id：{}", userId);
            //3、通过，放行
            return true;
        } catch (Exception ex) {
            log.error("JWT校验失败, token: {}", token, ex);
            response.setStatus(401);
            return false;
        }
    }
}
